The conjunction technology for pipe systems is a technologically sophisticated topic. For our heating coil welders we are looking for a transformer which reliably supplies the needed welding current. As the device will be used on construction sites or for service repairs, it needs to be light weight and simultaneously solid. Environmental influences like humidity and dirt may not harm the transformer. It also needs to be able to temporary deal with multiple overload without failure. The voltage has to remain stable, the percental short-circuit voltage has to be very small.
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